1. Get a valid CDWserver Pro license key, save it as
    @CONFIGDIR@/key.txt
    on the server and make sure the user "@USER@" can read it by:
    chown @USER@:@GROUP@ @CONFIGDIR@/key.txt
    chmod 400 @CONFIGDIR@/key.txt
    
  2. Important: Make sure your system clock is valid.
  3. Visit the "About" page to check the active license.